The band theory of metals has been subjected to experimental tests many times and is now the accepted model of the behaviour of conductors and insulators. But it has to be modified when it comes to superconductivity. Electrical resistance is due to collisions of the electrons (whether treated as particles or waves) with impurities, imperfections […]
Complex systems in biology have several levels of organization, establishing a hierarchy of systems and subsystems. An ant colony is a wonderful example with the highest level being the colony itself, formed by hundreds or thousands of insects, each individual ant formed by millions of cells including 10 5 -10 6 neurons, and each cell […]
In our previous post, we have discussed the importance of a loophole-free entanglement experiment. Now, we are going to discuss one of the most important loopholes for this kind of experiments, the locality (or communication) loophole . To understand the locality loophole we need to review the Bell’s inequalities experiments one more time. Alice and […]
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Massive gas cloud boomeranging back to Milky Way A massive gas cloud that was almost ejected from the Milky Way is hurtling back to our galaxy, according to findings gathered from new observations by the Hubble Space Telescope. Dubbed the Smith Cloud, it is expected to smash into the galactic plane in about 30 million […]
In the early days of organic chemistry, the word aromatic was used to describe fragrant substances such as benzene (from coal distillate), benzaldehyde (from cherries, peaches, and almonds), and toluene (from tolu balsam). It was soon realized, however, that substances classed as aromatic differed from most other organic compounds in their chemical behaviour. Today, the […]
A review of the book: The brain electric: The dramatic high-tech rage to merge minds and machines by Malcolm Gay Flying cars, self-tying shoes or a fully functional hoverboard are only a few examples of the inventions which, according to the time-travel adventure sequel Back to the Future Part II, should be available for purchase […]
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Noodle-, hazelnut-shaped plasma lenses may be hiding in Milky Way Scientists are learning more about the shape of mysterious plasma lenses, which seem to invisibly float around the Milky Way, detected through radio waves. Researchers were able to detect a lengthy lensing event that gave them an idea of the shapes of the lenses. Space.com […]
At a fundamental level the term “quantum computing” implies de use of quantum effects that have no classical analogue to process information. In a “classical computer” information is held in bits, which can have two alternative values (0 and 1). quantum computer the values 0 and 1 are held simultaneously in an entangled state. This […]
Animals drift when they enter a fluid (liquid or gas) and are transported to a new location by gravity or currents. Drift is best known from rivers and ocean currents, but can also occur on land, whenever organisms leave their former solid position, pass into the air, and are moved significant distances by the combined […]
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Fish communicate to stay close to each other Fish use calls to stick together as a group, a new study suggests. Researchers played recordings of bigeye vocalizations for captive wild bigeyes, and noted that their own vocalizations increased and they swam more closely together than they did when no recordings were played. “This study means […]